Revista medico-chirurgicală̆ a Societă̆ţ̜ii de Medici ş̧i Naturaliş̧ti din Iaş̧i
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Patients with unknown primary site cancer represents 5% to 10% of all neoplasia patients. Liver is a favourite site for gastrointestinal tumors, but not only. ⋯ However, liver biopsy could be essential for histological diagnosis and important to identify the tumors who may benefit from specific and effective therapy (breast cancer, prostate cancer, ovarian cancer and small-cell carcinoma of the lung). Systemic chemotherapy represents the most frequently treatment, but only patients with good performance status and without co-morbidities may benefit. "Best supporting care" may be the optimal treatment for most patients, majority with poor performance status at the time of diagnosis.